ChEjs

Chemical engineering scripts (made by and for chem eng students)

Installation

npm i chejs

Usage

const chejs = require('chejs');

Functions

Conversion

tempConvert(input, inputUnit, outputUnit)

Supported units: Celsius(c), Fahrenheit(f), Kelvin(k)

const temp = chejs.tempConvert('300', 'k, 'c');

unitConvert(input, inputUnit, outputUnit)

Supported units: see units.js

const unit = chejs.unitConvert('760', 'mmhg', 'atm');

Calculations

Molar Calculations

const molarMassFromFormula = chejs.molarMass('CH3CH2OH');

antoineCalculations(molecule, input)

Supported molecules: see antoine_constants.js Input can be vapor pressure or temperature. Feel free to use any of the supported units.

const pvap = chejs.antoineCalculations('Methyl_alcohol', '760mmhg');

heatCapacityFromConstants(compound, state, temperature)

This calculates heat capacity at constant pressure.

Supported compounds, states, temperatures: see heat_capacity_constants.js

const heatCapacity = chejs.heatCapacity('acetone', 'g', '30');

Physical Chemistry

chejs.idealMu(moleFraction, gibbs, R, T)
chejs.idealGibbsEnergy(moleFraction, gibbs, R, T)
chejs.idealEntropy(moleFraction, entropy, R)
chejs.idealVolumn(moleFraction, volume)
chejs.idealEnthalpy(moleFraction, enthalpy)